Mining machine



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F. CARTLIDGE IINING IACHINE Original Filed June 20, 191B 7 Sheets-Sheet 3 Iflver to Aug. 7, 1928.

F. CARTLIDGE unmm ncnzma Original Fiied June 20, 1918 7 Sheets-Sheet Iuve at r: 51m CGZ i a; try

Aug. 7, 1928. 1,686,246

F. CARTLIDGE IINING MACHINE Original Filed June 20, 1918 7 Sheets-Sheet 5 W'7W/77///7/77/ ///1 1 [W1 [17/ 1f//? L/f I I I fig. 12/.

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F. CARTLIDGE MINING MACHINE Original Filed June 20, 1918 7 Sheets-Sheet 6 I In 11/1/LU/ LL //////4/ ///L/// 1,680,246 F. CARTLIDGE MINING MACHINE Original Filed June 20, 1918 7 Shoots-Sheet '7 Aug. 7, 1928.

8 u my I v R Z a 7 a, Q 4 W L 6 a s We 19. f///////// r///// Patented Aug. 7, 1928.

UNITED STATES PATENT OFFICE.

FRANK CABTLIDGE, OF CINCINNATI, OHIO, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

MINING MACHINE.

Application "Jed June 20, 1918, Serial No. 240,969. Renewed September 15, 1923.

This invention relates to mining machines, and especially to machines of the type adapted to cut either horizontal or vertical kerfs in a mine face, although, as will be seen, certain features thereof are by no means limited to machines of this particular type, but are capable also of use in connection with" machines of other types, as, for example, machines for cuttin horizontal kerfs alone, or those for cutting vertical kerfs alone.

The invention has for a general object the provision of improved means for positioning, supporting, guiding, operatin and controlling the cutting mechanism w ereby the same is enabled to cut kerfs in a wide variety of planes, and whereby said mecha nism is securely supported, accurately guided, and convenient y and reliably controlled during the cutting operation.

An important object of the invention is the provision of a truck mounted entry CUL- ting machine adapted to cut a kerf in substantially the plane of the entry bottom, whereby the plane of said bottom may be maintained as the driving of the entry proceeds without supplemental shooting or other subsequent operation to remove the coal left upon said bottom by the cutter.

The foregoing and other objects of the invention, together with means whereby the same may be carried into effect, will best be understood from the following description of certain forms or embodiments thereof shown for purposes of illustration in the accompanying drawings.

In said drawings,-

Fig. 1 is a side elevation, Fig. 2 a plan view, and Fig. 3 a front elevation, partly broken away, of the complete machine.

Fig. 4 is an enlarged longitudinal vertical section taken substantially on the line 44, Fi 2.

Fig. 5 is a detail horizontal section taken substantially on the line 5-5, Fig. 4.

Fig. 6 is a longitudinal vertical section, taken substantiall on the line 6-6, Fig. 7 of the truck an guide with the cutting mechanism removed.

Fig. 7 is a plan view of the truck with the guide and cutting mechanism removed.

Fig. 8 is a detail view of the jack employed for bracing the cutting mechanism against lateral thrust.

Fig. 9 is a detail elevation of a portion of the clutch mechanism for controlling the swinging of the cutter bar.

Fig. 10 is a lan view partly broken away, showing a mo fied form of raising and lowering mechanism.

Fig. 11 is a detail elevation of a portion of the mechanism shown in Fig. 10.

Fig. 12 is a simplified diagrammatic plan view illustrating the operation of the machine in undercutting.

Fig. 13 is a simplified diagrammatic side elevation illustrating the operation of the machine in shearing.

Fig. 14 is 'a similar view showing the parts adjusted for transportation about the mine.

Fig. 15 is a similar view illustrating the operation of undercutting, and showing the manner in which the cutter is caused to operate substantially in the plane of the mine bottom.

Fig. 16 is a simplified diagrammatic plan view illustrating the operation of the machine in cutting a vertical kerf in a face located parallel to the track.

Fig. 17 is a similar view illustrating the operation of making a similar cut in the center of the end face of a mine entry.

Fig. 18 is a similar view illustrating the operation of the machine in makin a similarcut in substantially the plane 0 a rib or side wall of the entry.

Fig. 19 is a simplified diagrammatic side elevation illustrating the operation of the machine in making an undercut in a plane inclined to the plane of the entry bottom.

Fig. 20 is a simplified diagrammatic end elevation illustrating the operation of the machine in making an inclined undercut in a face parallel to the track.

Fig. 21 is a sectional view on the line 21-21 of Fig. 7.

The invention is herein illustrated as embodied in a truck mounted machine equipped with a cutter bar and an endless cutter chain of the type now ordinarily in use in coal cuttin machines, and provided with imrov means whereby said cutter bar may adjusted into various operative positions to insert an undercut or to cut a vertical kerf, all while the cutting mechanism is maintained upon the truck.

Referring to Figs. 1 and 2, the machine includes a truck frame 25 mounted on wheels 26 adapted to run upon the usual trackway 27. As illustrated, the truck is preferably adapted to be propelled about the mine under its own power and to this end the axle of one pair of wheels 26 is connected by chain and sprocket gearing 28 with a shaft 29 journaled in the truck body 25 and provided with a worm gear 30 (see Fig. 6) meshing with a worm 31 on the shaft 32 of an electric or other motor 33. Preferably, the motor 33 is of the reversible type and is controlled by a suitable controller 34. The worm 31 is preferably loosely mounted on the sllilft 32 and may be connected therewith by means of a suitable clutch 35. Thus it will be seen that by proper operation of the controller 34 and clutch 35, the truck may be propelled about the mine at will under its own power and in either direction, or may remain stationary.

Carried upon the truck frame 25 is a supplemental supporting frame or turntable 36 disposed in a plane substantially parallel to the lane of the track 27 and truck frame 25, ut mounted on the latter for angular and vertical movement with respect thereto. To this end, the truck frame 25 is formed with a cylindrical chamber or guide 37 which receives a depending cylindrical flange 38 bolted or otherwise secured to the frame 36, said flange 38 substantially fitting and tele sco ing with the guide 37 and being prefera 1 braced by suitable radial l'lbS 39. The auge 38 is adapted to turn within the guide 37, thereby permitting the frame. 36 to be adjusted into substantially any angular position with respect to the truck body 25 and trackway 27.

For raising and lowering the frame 36 with respect to the truck, there is provided a hydraulic motor, ram, or jack comprising a cylinder 40 arranged concentric with the guide 37 within the same, and a piston 41 within said cylinder and abutting, at its upper end, the lower side of the frame 36. The cylinder 40 is preferably formed integral with the guide 37 and is provided at lts under side with a removable head 42. The iston 41 may be provided with acking 43 of any suitable form. The cyli er 40 is supplied with ressure fluid through a passage 44 in the ottom wall of the guide 37, said passage communicating with a pipe 45 leading from the discharge valve 46 of a pump com rising a plunger 47 operating in a cylin er 48. The pump cylinder 48 is provided with the usual inlet valve 49 communicating with a reservoir 50 for oil or other liquid, said reservoir being preferably formed integral with the guide 37. The operation of the piston 41 in the cylinder 40 is controlled by a suitable valve 51 interposed between the pump cylinder 48 and the dischar valve 46, and communicating also wit the reservoir 50, said valve being preferably of the three-way type andoperable to admit pressure from the pump cylinder 48 to the ram cylinder 40, to trap liquid in said ram cylinder, or to discharge said liquid into the reservoir 50. Valves of this type being well known in the art, this valve is not illustrated in detail herein, as, specifically, it forms no portion of the resent invention.

The pump p unger 47 is connected by a pitman 52 with a crank disk 53 (see Fig. 7) on a shaft 54 journaled in suitable bearings on the truck frame 25, said shaft being provided with a worm gear 55 meshing with a worm 56 loosely mounted on the motor shaft 32. The clutch 35 is preferably double acting, and is adapted to connect either of the worms 31 or 56 to the shaft 32, or to occupy a neutral position in which both of said worms are disconnected from said shaft, whereby the power of the motor 33 may be employed at will either to propel the truck or to raise the frame 36 by means of the hydraulic ram 40, 41.

Mounted on the turntable or supporting frame 36 for tilting movement about a transverse horizontalaxis, is a carriage or guide 59 having a pair of parallel ways 60 provided, respectively, with trunnions 58 which are received in bearings in uprights 57 carried by said frame 36. The guide 59 with its ways 60 may be angularly adjusted with respect to the frame 36 about the axis of the trunnions 58 by means of an adjusting screw 61 pivoted at 62 to a cap plate 63 bolted or otherwise secured to the frame 36, said screw cooperating with a nut 64 rotatably secured, as by suitable gibs 65, to the guide 59 and provided with a suitable hand wheel 66.

Mounted in the ways 60 for movement longitudinally thereof, is the cutting mechanism including a. reversible electric or other motor 67 having a suitable controller 67 (Figs. 1 and 2), a cutter bar 68 carrying the usual endless chain 69 provided with cutter bits 70, and connections hereinafter more fully described for supporting, positioning, and operating the cutter bar and for actuating the cutter chain.

Mechanism is provided for moving the.

cuttin mechanism above referred to longitudina ly in the ways 60 in either direction, said mechanism, as herein shown, in Figs. 1 and 2 being as follows: The shaft 71 of the motor 67 is provided with a bevel pinion 72 which meshes with a bevel gear 73 on an upright shaft 74 journaled in an extension 75 on the motor frame. The shaft 74 is provided with a worm 76 which meshes with a worm gear 77 on a shaft 78 journaled 1n uprights 79 on the extension 75. Loosely mounted on the shaft 78 is a pair of spur gears 80 and 81 having clutch faces adapted to be engaged by a clutch hub 82 operated by a suitable clutch lever 83, whereb said I: utch hub may be operatively engage with either of the gears 80 or 81 to connect the same to the shaft 78, or may be moved into a neutral position in which both of said ears are disconnected from said shaft. gear 80 meshes with a gear 81 on a shaft 85 extending parallel to the shaft 78 and also journaled inthe uprights 79. The gear 81 meshes with a pinion 86 which in turn I meshes with a gear 87 also on the shaft 85.

By moving the clutch hub 82 to connect the ear with the shaft 78. the shaft will e driven from said shaft 7 8 in one direction by the ars 80 and 84, while by operating the clutch ab 82 to connect the gear-81 with the shaft 78, the shaft 85 will be driven in the opposite direction through the gears 81, 86,

and 87. The shaft 85 carries at its ends pinions 88 which mesh with racks 89 formed on the ways 60, whereby as the shaft 85 is rotated in' one direction or the other the cutting mechanism will be fed forwardly or backwardly in said ways, said pinions serving also as roller supports for the rear end of the motor'casing upon the ways 60.

-A modified form of mechanism. for raising and lowering the guide 59 relative to the truck, capable of use in substitution for 'the hydraulic ram above descr bed, is illustrated in Figs. 10 and 11. As shown in said figures, a shaft 90 is rotatably mounted in suitable bearings in the ways 60. said shaft being provided with a gear 91 adapted to be engaged by thegear87 when the cutting mechamsm is in its rearmost position in.sa1d ways. The shaft 90 is provided at its ends with worms 92 which cooperate with worm gears 93 onshafts 94 extending parallel to the ways 60 and journaled in suitable brackets 95 secured thereto. Upon each end of each of the shafts 94 is a pinion 96, said pinions meshing with racks 97 formed on uprights 98 rising from the turntable or supporting frame 36. Cooperating with-the uprights 98 are gibs 99 secured to the ways 60, whereby the carriage 59 is guided for vertical movement on said ways. The walls of the up rights 98 are formed with slots 100 through which the shafts 94 extend, said. slots permitting the vertical movement above referred to. The ar 91 is loosely mounted on the shaft 90 but may be operatively connected thereto by means of a friction clutch 101 operated by a clutch controlling' lever 102, and in this form of the; invention the gear 87 is also loosely mounted on its shaft 85 and is operatively connected therewith by means of a clutch hub 103 operated by a clutch controlling lever 104. By proper operation of the clutches 101 and 103 and oft-he motor controller 67 (which governs the direction of rotation of the motor), the mechanism can be so adjusted as to cause the carriage 59 to be raised or lowered, or

to cause the cutting mechanism to be fed forwardly or backwardly in the ways 60.

Referring to Fig. 4, the casing of the motor 67 is formed at its forward end with a vertically disposed disk 105 having a peripheral flange 106 upon which is guided, for rotary movement about an approximately horizontal longitudinal axis, the annular rear end 107 of a casing or turret 107 carrying the cutter bar and certain of the transmission mechanism for actuating the same. The forward end of the casing or turret 107 is provided with a trunnion 108 which is journalcd in a yoke 109 secured at its rear end to the casing of the motor 67. and. provided adjacent its forward end with rollers 110 engaging the ways 60, whereby the forward end of said turret is supported and said turret rendered free to rotate about a longitudinal axis without imposing eccentric strains upon the annulus 107 and guide disk 105 by which the rear end of said turret is rotatably supported from the motor casing. For so rotating the turret 107, said turret has secured thereto a segmental rack 111 with which cooperates a pinion 112 fixed upon the forward end of. a shaft 113 journaled in suitable brackets 113 on the casing of the motor 67. said shaft having fast upon its rear end a worm gear 114 (Figs. 1 and 2) cooperating with a worm 115 on a shaft 116 journaled in suitable bearings 116 on the motor casing. said shaft hhving on its end a gear 117 which meshes with a gear 118 loosely mounted on the shaft 78 but adapted to be connected therewith by means of a friction clutch 78 controlled by a. suitable clutch lever 78".

Mounted upon the turret or casing 107 for rotation about an axis transverse to the axis of rotation of said turret 107, is a second turret or casing 119 (Fig. 4). Said turret 119 comprises a fiat cylindrical portion 119, a sleeve portion 119", and an outer or lower head portion 119, said portions being preferably connected by a strengthening web 119". The cylindrical portion 119 has bolted or otherwise secured therto a ring or annulus 120 which engages an annular guide surface or flange 121 on the turret 107 while the sleeve portion 119 is rotatably mounted on a similar sleeve portion 119 of the turret 107. To facilitate the assembly of the parts, the flange 106 and annulus 107 are cut away, as at 119. leaving an opening through which the cylindrical portion 119 may be passed when the sleeve portion 119 is slipped over the sleeve portion 119. The cutter bar 68 is carried by a casting 68 bolted or otherwise secured within the head portion 119. The sleeve portions 119 and 119 are of such a length that the c utter bar 68 is offset from'the axis of rotation of the turret 107 a distance which is greater than one-half the outside horizontal width of the ways 60, so that by rotating the turret 107, as above explained, the cutter bar may be swung upwardly from the horizontal position shown in Figs. 1 to 4 into a vertical position at one side or the other of the ways 60 and beyond or outside the same, as shown, for example, in Figs. 16, 17, and 18.

The motor shaft 71 is journaled at its forward end in a bearing 122 located in a suitably disposed opening in the guide disk 105, said shaft having secured to its forward end a pinion 123 which meshes with a gear 124 fast on a hollow shaft 125 coaxially disposed with respect to the turret 107 and journaled in suitable bearings therein. Theshaft carries at its forward end a bevel pinion 126 which meshes with a bevel gear 128 on a shaft 129 journaled adjacent its upper end in suitable bearings in the turret 107. passing through the sleeve portions 119" and 119, and journaled at its lower end in a bearing 130 in the turret 119, said shaft being coaxially disposed with respect to the latter turret. Rotatably mounted on a sleeve 131 fixed to the shaft 129 adjacent its lower end is a sprocket 132 for actuating the cutter chain 69, said sprocket being adapted to be connected with the shaft 129 for rotation therewith by means of a clutch hub 133 con-' nected by links 134 with a clutch controlling ring 135 operable from the exterior of the turret or casing 107 by means of suitable clutch controlling handles 136 (Fig. 3).

For turning theturret 119 upon its axis to swing the cutter bar 68 about said axis, the following mechanism is provided: The cylindrical ortion 119 of the turret 119 is formed wit an internal gear or rack 138 with which meshes a pinion 139 on the end of a shaft 140 journaled in a suitable bearing 137 in the turret 107. Fast upon the shaft 140 is a. worm gear 141 which meshes with a worm 142 on a shaft 143 journaled in suitable hearings in the turret 107. The shaft 143 has fast upon its opposite'ends large and small gears 144 and 145, respectively, (see Fig. 5) which mesh with small and large gears 146 and 147 loosely mounted on a shaft 148, also journaled insuitable bearings in the turret 107, and adapted to be alternatively clutched thereto, as by clutch hubs 149 and 150, whereby the shaft 143 may be operatively connected with the shaft 148-for relatively fast andfslow rotation, or. may be operatively disconnected therefrom. The clutch hubs 149 and 150 are carried by a yoke 151 connected to a slide 152 (Fig. '4) guided in a cap plate 153 in the turret 107, said slide 152 being movable to operate said clutch hubs by means of an arm 154 on a shaft 155 coaxially disposed within the shaft 125 and journaled therein and in abushing 156 carried b the turret 107. For convenience in assem ling, the shaft 155 is preferably formed in two separable parts connected by a clutch or coupling 157. At its end, the shaft 155 carries a bevel gear 158 which meshes with a bevel gear 159 on a shaft 160 journaled in suitable bearings and carrying at its opposite end a bevel gear 161 (Fig. 9) which meshes with a bevel ear 162 on an upright shaft 163 journaled in the motor casing and provided at its end with an o crating handle 164 (Figs. 1 and 2). T e shaft 148 has fast thereon a worm gear 165 (Figs. 4 and 5) which cooperates with a worm 166 loosely mounted on the shaft 129 but normallyconnected therewith by a yielding device or friction 167 such as is usually employed in machines of this character toprevent damage to the parts under conditions of overload. The friction device herein shown is of a type well known in the art and, as,'speci ically, it forms no portion of the present invention, will not be described in detail herein.

The machine herein described may be employed in the operations of entry driving either for the purpose of undercuttin" or for thepurpose of making vertical or s ear cuts. In either event, the machine is ropelled under itsown power to the en of the entry, and of the trackway therein, until the ends of the ways 60 are brought into engagement with the face to be cut, said ways being thereupon secured to the face, as by means of spurs 168 carried thereby.. If desired, said ways may be further provided with jacks'169 (Figs. 13,14, and 15) adapted to engage at their opposite ends the mine face and roof, respectively. The ends of the ways 60 may, therefore, be securel supported by the mine face without inter erence with the free 0 eration of the cutter bar upon said face eneath said ways. If desired, the truck may be securely anchored in place by means of short jacks 170 (Figs. 12 and 13) pivotally connected to the truck body 25'and adapted toengage the mine bottom between the rails of the trackway 27 or adjacent thereto.

In the operation of undercutting, the tarret 107 being in the position shown in Figs. 1 and 4, with the cutter bar horizontal, the turret 119 is rotated to swing the cutter bar outwardly into the position indicated by the letter A in Fig. 12. The cutting mechanism ,is then fed forwardly in the ways 60 to carry the cutter bar into the position B shown in Fig. 12, thereby making the sumping cut. The turret 119 is then swung to carry the cutter bar from the position B to the position C; and the cutting mechanism is finally moved backwardly in the ways 60 into-the to be reversed without reversing the motor 67 and consequently the direction of travel of the cutter chain, so that the latter continues to out throughout the rearward as well as the forward movement of the cutting mechanism. In order to resist turning of the turret 107 on its axis due to the reaction or thrust of the ecpentrically carried or offset cutter bar during its cutting operation, an auxiliary jack 171, shown in detail in Fig. 8, may be employed. Said jack preferably comprises two relatively extensible arts in threaded engagement with one anotlier, one of said parts being provided with a yoke 172 adapted to embrace the sleeve portion 119" of the turret 119, and the other of said parts carrying at its end a spur 174 vadapted to engage the rib or side wall of the entry.

In the operation of shearing, which is diagrammatically illustrated in Fig. 13, the turret 107 is rotated to swing the cutter bar upwardly into a vertical position at one side or the other of the ways 60, whereupon the mechanism may be operated, substantially as above described in connection with undercutting, to produce a vertical cut.

It will be seen that the entire cutting mechanism, and especially the cutter bar, is supported or suspended beneath its guides or ways 60. By virtue of this underslung arrangement, several important advantages are obtained. For example, and as above explained, the guides 60 may be securely supported at their ends by the mine face being cut, by either the spurs 168 or jacks 169, or both. thereby provid'ng firm supporting and guiding means for the cutting mechanism in close proximity to the face. Also, as above explained, the cutter ba-r may be swung upwardly from its horizontal position in either direction into a vertical position at either side of the ways 60 and beyond the same, thereby permitting said cutter bar to swing freely in either one of two vertical planes without interference therewith by said guides. In this manner a vertical cut may be inserted in either one of two planes oppo' sitely located with respect to the trackway. For example, if the trackway be located nearer one side than the other of the entry, as is frequently the case, the cutter bar may be employed to cut a vertical kerf substantiallv centrally of the entry, as shown in Fig. 17, or may be employed to cut a kerf in substantially the plane of the adjacent side wall or rib. as shown in Fig. 18, thereby insuring a straight rib.

Perhaps the most important advantage of the apparatus due to its underslung arrangement together with the provision for vertically adjusting the cutting mechanism, resides in the ability of the machine to cut squarely upon the mine bottom, that is to say, o make an undercut in a plane substantially coincident with the plane of the mine bottom. In the truck mounted entry driving machines heretofore generally used, it has been impossible to insert an undercut below the surface of the rails of the trackway upon which the truck travels. As a result, the undercut is usually made some six or eight inches above the entry bottom, so that, after shooting the coal, a layer (amounting approximately to a ton for each cut) remains upon the mine bottom and must be removed by hand, as by a special gang of men with picks, before the cutting can proceed. It will be seen, however, that with the present machine the hydraulic ram can be operated to elevate the cutter bar into a position above the tops of the rails, as shown in Fig. 14, thereby permitting the machine to be transported from place to place about the mine without interference with the rails by the cutter bar, but that when the end of the trackway is reached, as shown in Fig. 15, the elevating mechanism may be released to permit the cutter bar to rest squarely upon the bottom, so that, when operated in the manner above described, and as illustrated in Fig. 12, said cutter bar will produce an undercut such that, when the superimposed coal is broken down, the operation is complete, and there is no necessity of removing any coal from the mine bottom in order to maintain the plane of the latter.

Should it be desired, or any reason, to undercut the end face of the entry upon an inclination to the plane of the bottom previously established, as in avoiding an obstruction, Or in following a pitching seam, the machine may be adjusted as shown in Fig. 19, the elevating mechanism being operated to such an extent as may be necessary, and the hand wheel 66 manipulated to incline the guides 60 at any desired angle with respect to the trackway.

In addition to its operations upon the end face, as in entry driving, the machine is also capable of either shearing or undercutting a face disposed parallel to the trackway, as in opening a room neck. The operation of inserting a shear cut in such a face is illustrated in Fig. 16. T6 adjust the machine for this purpose the-turntable or supporting frame 36 is turned about the axis of the cylindrical gu de 37 in a direction to carry the forward ends of the guides 60 into engagement with the wall to be cut, after which the mechanism may be operated as above described in connection with entry driving. While the mechanism is illustrated in Fig. 16 as adjusted for the purpose of shearing, it is obvious that, by suitably rotating the turret 107, the mechanism may be adjusted to produce an undercut in a side face in the same manner as above described in connection with the end face. YVhere the side face or wall to be cut is in close proximity to the trackway, the mechanism may be adjusted into the position shown in Fig. 20, that is to say, the turret 119 may be rotated upon its axis to cause the cutter bar to extend laterally with respect to the trackway and to swing said cutter bar through any desired are at the side of said trackway. If it be desired to insert the undercut at an angle to the plane of the trackway, the turret 107 may be suitably rotated in order to bring the cutter bar into the desired plane, the parts being shown as so adjusted in F i 20.

while I have in this application specifically described certain forms which my in vention may assume in practice, it will be understood that these forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a mining machine, the combination with a guide disposable substantially against a face in which a kerf is being cut and a truck mounting therefor relative to which said guide is normally longitudinally extending and upon which said guide is adjustable while maintaining the plane thereof parallel to a horizontal line extending longitudinally of the guide. of cutting mechanism movable on said guide longitudinally thereof, said cutting mechanism being supported by said guide and being located beneath the same and being disposable substantially midway between the sides of said guide when the latter is in substantial abutment against the face.

2. In a mining machine, the combination with a guide disposable substantially against a face in which a kerf is to be cut anda truck mounting therefor relative to which said guide is normally longitudinally extending andupon which said guide is adjustable while maintaining the plane thereof parallel to a horizontal line extending longitudinally of the guide, of cutting mechanism movable on said guide longitudinally thereof, said cutting mechanism being suspended beneath said guide and including a swinging cutter bar disposable substantially midway between the sides of said guide when the latter is in substantial abutment against the face.

3. In a mining machine, the combination with a vertically rectilinearliy movable normall longitudinally exten ing guide disposable substantially against a face in which a kerf is to be cut, of cuttin mechanism movable on said guide longitudinally thereof, said cutting mechanism being supported by said guide and being located beneath the same and being disposable substantially midway between the sides of said guide when the latter is in substantial abutment against a face.

4. In a mining machine, the combination with a vertically rectilinearly movable normally longitudinally extending guide disposable substantially against a face in which a kerf is to be cut, of cutting mechanism movable on said guide longitudinally thereof, said cutting mechanism being suspended beneath said guide and including a swinging cutter bar disposable substantially midway between the sides of said guide when the lfatter is in substantial abutment against a ace.

5. In a mining machine, the combination with a laterally pivotable normally longitudinally extending guide engageable with the face, of cutting mechanism including a pivoted elongated cutter bar and including supporting means adjustable merely by swinging about a horizontal axis to osition said bar and its pivot substantially equal amounts beyond said guide at either side thereof while said guide remains stationary.

6. In a mining machine, the combination with a laterally pivotable normally.longitudinally extending guide engageable with the face. of cutting mechanism movable in said guide and longitudinally of the latter, 'said cutting mechanism including a cutter bar and being adjustable merely by swinging about a horizontal axis to position said cutter bar substantially equal amounts beyond said guide at either side thereof and parallel to the latter while said guide remains stationary.

7. In a mining machine, the combination with a laterally pivotable normally longitudinally extending guide engageable with the face to be cut. of cutting mechanism movable on said guide longitudinally thereof, and including-a cutter bar and means for supporting said bar on said guide beneath the latter and permitting swinging of said bar across the front end of said guideway and adjustable to position'said bar as a whole substantially e ual amounts beyond the guide at either si e of the latter without movement of said guide.

8. In a miningmachine, the combination with an approximately horizontally disposed guide, of cutting mechanism movable in said guide longitudinally thereof, said cutting mechanism including a turret rotatable about an axis extending longitudinally of said guide and a cutter bar carried by said turret and offset from said axis. whereby said cutter bar maybe positioned beyond said guide at either" s de thereof, said cutting mechanism bein movable in said guide to a position in w ich said cutter bar lies substantiall wholly in the rear of the front end of saic? guide.

9. *In a mining machine, the combination about an axis extending longitudinally of said guide, and a swinging cutter bar carried b said turret and offset from said axis where y said cutter bar may be positioned said guide at either side thereof, said cutting mechanism eing movable on said guide to a position in which the axis of swinging movement of said cutter bar is to the rear of the forward guide.

10. In a mining machine, the combination with an approximately horizontall disposed guide, of cutting hanism mova le in said guide longitudinally thereof, said cutting mechanism includin a turret rotatable about an axis extendin longitudinally of said guide and a cutter ar carried by said turret and offset from said axis, said. turret position said cutter bar in the front end of said gui e 11. In a minin machine, the combination with a guide, of ierf cutting mechanism including a swin ing cutter chain carryin cutter bar movable on said guide longitudinally thereof, and means for sup orting the forward end of said guide from t e face be- 12. In a mining machine, the combination with a guide, of kerf cutting mechanism includin a swin 'ng cutter chain carrying ar movab e on said guide longitudinally thereof, said cutting mechanism bein supported by said guide and being located neath the same, and means for supporting the forward end of said guide from the In a minin machine, the combination with a uide an means for supporting the forwarf end of said guide in the face being cut, of cutting mechanism'movable in sai guide longitudinally thereof, said cutt ng side thereof. In a mining machine, the combination with a guide, of kerf cutting mechanism ineluding a swinging cutter chain ca cutter bar movable on said guide longitudinally thereof, said guide having a projecting portion adapted to engage the'mme face to support said guide.

15. In a mining machine, the combination with a guide, of cuttin in said guide longitudinally thereof, and a double pointed jack carried by said guide at for holding the same against mechanism movable V its forward end, said jack being adapted to engage the mine roof and face at its opposite ends, respectively.

16. n a mining machine, the combination with cutting means including a chain carrying cutter bar ivotally mounted for swinging movement in intersecting planes and an actuating motor therefor whose axis of rotation is parallel to the planes of the bar, of means for supporting said cutting means, said supporting means being vertically rectilinear y movable and being adjustable about a transverse horizontal axis.

17. In a mining machine, the combination with a guide and cuttin mechanism longitudinallymovable in said guide during cuttmg and pivotally mounted for swinging movement, of means for moving said guide for tilting the same about a transverse horizontal axis.

18. In a mining machine, the combination with a guide, of cutting mechanism movable on said guide longitudinally thereof during cutting, said cutting mechanism comprising a pivoted cutter bar and being supported by said guide and'being located beneath the same, means for movin said guide vertically, and means for tilting the same about a transverse horizontal axis.

In a mining machine, with angularly adjustable cutting mechanism including a cutter movable in planes substantially parallel to the axis of ment of said cutting mechanism and offset therefrom, of a jack en aging said cutt'ng mechanism for holding t e same against angular movement about said axis when said cutter is in operation.

20. In a minin machine, the combination with a ide an means for supportin the combination cut, of cutting mechanism angular] adjustable and lon tudinally movable wit respect to said gui e, 'said cutting mechanism including a cutter movable to the axis of adjustment of said cutting mechanism and offset therefrom, and a jack engaging said cutting mechanism angular movement when said cutter is in operation.

21. n a miningmachine, the combination k comp two relatively extensible members, one of said members having means for engaging said turret between said cutter bar and axis, and the other of said members having means for engaging the mine wall.

22. In a mining machine, the combination with cutting means, of guiding means for supporting said cutting means relative to which the latter is reciprocable during c'utthe forwar end of said guide in the face eing adjustting, said guiding supporting means being vertically movable and being angularly adjustable about a vertical axis and about a transverse horizontal axis.

23. In a mining machine, the combination with a guide, of cutting mechanism including a cutter bar angularly movable relative to a plurality of axes longitudinally movable in said guide during cutting and disposable in one position thereof substantially wholly between the ends of the latter, said guide being vertically movable and being adjustable about a vertical axis.

A. In a mining machine, the combination with cutting mechanism including a pivoted cutter bar, of supporting means therefor including an element providing a guide along which said cutting mechanism is movable in lines parallel to the plane of said bar, adjustable supporting means for said element having provision for the vertical movement of the latter, and a fluid pressure operated ram for moving said element vertically, said supporting means for said clement also comprising means permitting angular movement of said element upon the axis of said ram.

25. In a mining machine, in combination, a vertically movable guide. cutting mechanism movable in said guide and longitudinally ot the latter during cutting, said cutting mechanism comprising a pivoted bar swingable in planes parallel to the major dimension of said guide, and a hydraulic motor for raising and lowering said guide to permit said cutting mechanism to operate at different elevations.

26. In a mining machine, in combination, a vertically movable guide, cutting mechanism movable in said guide longitudinally thereof during cutting, said cutting mechanism being supported by said guide and being located beneath the same, and a hydraulic motor for raising and lowering said guide to permit said cutting mechanism to operate at different elevations.

27. In a mining mac ine, the combination with a pair of ways, of cutting mechanism movably mounted in said ways and including a cutting element carrying cutter bar swingable in a pendicular to t e plane of said ways, and a motor for actuating said cutting elements, said cutting mechanism havin at each end a pair of rollers engaging sai ways respectively and supporting thereon the weight of said cutting mechanism and certain of said rollers constituting both' propulsion members and supporting members.

28. In a mining machine, the combination with apair of ways, of cutting mechanism movably mounted in said ways and susbeneath the same, said cutting mechanism including a cutter and a motor for operatin the same'and haviikg at each end a pair 0 rollers engaging sai ways respecplane and about an axis pertively, certain of said rollers constituting propulsion members as well as supporting members.

29. In a mining machine, the combination with a pair of ways provided with racks, of cutting mechanism movably mounted in said ways and including a cutter chain carrying pivoted cutter bar and a motor for operating the same, a pair of rollers engaging said ways respectively for supporting the forward end of said cutting mechanism, and a pair of pinions operated by said motor and engagin said racks respectively for supporting t e rear end of said cutting mechanism and for moving the same longitudinally in said ways.

30. In a mining machine, in combination, guiding means, a cutter movable relative thereto, a turret by which said cutter is carried, said turret being rotatable about a substantially horizontal axis to permit said cutter to operate in different planes including a plane substantially coincident with the mine bottom, and means for supporting said turret at both ends on said guiding means.

31; In a mining machine, in combination, a guide, a cutter, a turret by which said cutter is carried, said turret being located beneath said guide and being rotatable about a substantially horizontal axis to permit said cutter to operate in different planes including a plane substantially coincident with the mine bottom, and means for supporting both ends of said turret from said guide.

In a mining machine, in combination, a pair otways, cutting mechanism movably mounted in said ways and including a cutter, a motor for operating the same, a turret by which said cutter is carried, said turret being rotatable about a horizontal axis to permit said cutter to operate in diflerent planes and being supported at its rear end said motor, means-engaging said ways for supporting said means engaging said the forward end of directl with the latter.

33. n a mining machine, in combination, a swinging cutter bar, and means for supporting said cutter bar having provision for guiding the same for opposite bodily rectilinear movements during cutting and for adjusting the same vertically and also bodily angularly about a substantially horizontal lon itudinally extending axis into a substantially horizontal or a vertical plane, said supporting means including a truck mounted guide disposable substantially against a workin face and between whose sides said bar is isposable midway.

34. In a mining machine, a swinging cutter bar,

motor therefrom, an

ways for supporting said turret cooperating in combination,

and means for supporting said cutter bar having provision for guiding the same for opposite bodily rec- -porting said cutter bar having provision or guiding the same for opposite bodily rectilinear movements during cutting and for adjusting the same vertically and also bodand having associated ily angularly about a substantially horizontal lon itudmally extending axis into a substantiaIly horizontal or a vertical lane, said supporting means includinga truc mounted guide disposable substant ally against a workin face and between whose sides said bar is disposable midway and said cutter bar being mounted to swing about an axis transverse to said horizontal longitudinally extending axis and having associated therewith a driving motor having a rotating ele ment whose axis of rotation is parallel to the plane of the bar at all times.

36. In a mining machine, in combination, a swinging cutter bar, and means for supporting said cutter bar having provision for guiding the same for opposite bodily rectilinear movements during cutting and for adjusting the same vertically and also bodily angularly about a substantially horizontal longitudinally extending axis mto a substantially horizontal or a vertical lane, said sup orting means including a true mounted gui e disposable substantially; against a working face and between whose sides said bar is disposable midway and said cutter bar being mounted to swing about an axis trans verse to said horizontal longitudinally extending axis and bein ofiset from the atter therewith a driving motor having a rotating element whose axis of rotation is parallel to the plane of the bar at all times,

37, In a mining machine, in combination, a bodily verticall movable uide and cutting mechanism ongitudinal y movable in said -guide during cutting and disposable between the ends thereof when parrallel to its patlr on said guide, said cutting mechanism including a cutter angularly ad]ustable about an axis extending longitudinally of said guide and adapted to act in difl'erent planes.

38. In a mining machine, a bodily verticall movable ide and cutting mechanism ongitudina y movable in said guide during cutting and disposable between the ends thereof when parallel to its path our-said guide,

in combination,

said cutting mech-' anism including a cutter angularly adjustable about an axis extending longitudinally of said guide and adapted to act in different parallel planes.

39. In a mining machine, in combination, a bodily vcrticall movable guide, cutting mechanism movabi; in said guide longitudinallfyl' thereof during cutting, said cutting mec anism having provision for adjustment about an axis extending longitudinally of said guide and including a cutter bar offset from said axis whereby said cutter bar may be positioned beyond said uide at either side thereof, said cutter bar being mounted to swing about a second axis transverse to said first named axis and disposable to cut the plane of said guide between the sides of the a er.

40. In a minin machine, in combination, a bodily verticalIy movable guide, cuttin mechanism longitudinally movable in sai guide durin cutting, said cutting mechanism inclu mg a cutter angularly adjustable about an axis entending longitudinally of said guide while the latter remains Sta-- tionary, and means for tilting said guide about a transverse horizontal axis,

41. In a minin machine, in combination, cutting means i nc uding a pivoted cutter bar and means for supporting the same including a vertically movable support engageab e with the face for support thereby, and a turret mounted on said support to turn about a substantially horizontal axis lying in a line disposed in fixed space relation to said face engaging sup orting means.

42. In a minin mac 'ne, in combination, cutting means incIuding a pivotally mounted cutter bar, and means for supporting the same including a vertically movable turret mpunted to turn about a substantially IIOI'I? zontal axis, a second turretcarried by'said first named turret and movable about an axis transverse to said first named axis, and,

a support en geable with a workin face for support tlizreby and movable with said first mentioned turret on vertical movement of the latter.

43. In a mining machine, in combination, a cutter, a vertical] movable turret, said turret being rotatablh about a substantially horizontal axis extending longitudinally of said machine, means for supporting said turret at both ends, and a second turret carried by said first named turret and by which said cutter is carried, said second turret being movable about an axis transverse to said first named axis.

44. In a mining apparatus,

mg overhanging vertically and tiltingly adjustable guiding means, of supportin means'carried at the forward end thereo and adapted to engage the face of material to be cut to support one end of the guidthe combina-V 'tion with a truck having forwardly extending means, and cutting mechanism including a motor and a cutting device reciprocablc longitudinally along said guiding means and adapted to cut on either direction of movement thereof.

45. In a mining apparatus, a support, a kcrf cutting mining machine mounted on said support and guided thereby for strictly rectilinear movement and including a cuttcr chain carrying cutter bar adapted to cut intersecting kerfs, and means for supporting said machine on the face of the material to be mined.

46. In a mining apparatus, a support, a kerf cutting minin machine mounted on said support and guided thereby for strictly rectilinear movement and including a cutter chain carrying cutter bar adapted to cut intersecting kerfs, and; a plurality of spaced means for supporting said machine on the face of the material to be mined.

47. In a mining apparatus, a truck, substantially horizontal supporting means thereon ada ted to contact with and be supported by t e working face of the material to be mined, a kerf cutting mining machine thereon and movable bodil relative thereto during cuttin of a plane erf in the working face, an means for ing one of said last two elements.

48. In a mining apparatus, a truck, substantially horizontal supporting means thereon adapted to contact with and be supported by the working face of the material to be mined, a kerf cuttin mining machine thereon adapted to cut p ane kerfs in the working face in planes parallel with said supporting means, and means for rotating one of said last two elements about a vertical axis.

49. In a mining apparatus, a truck, substantially horizontal supporting. means thereon adapted to contact with and be suported by the working face of an entry, a

erf cutting mining machine thereon adapted to cut plane-kerfs in the working face in planes parallel with said supporting means, and means for tilting and swinging the same about axes in intersecting planes.

50. In a mining apparatus, a support, a kerf cutting mining machine rotatively adjustable thereon about a vertical axis and including longitudinally disposed machine supporting means ad ustable on said support about a horizontal transversely extendin adapte to cut a plane kerf in the working face in a plane parallel with said supporting means, and means for varying the elevation of said supporting means to permit cutting in parallel planes at different elevations. p

51. In combination, a truck, an elongated pivoted guide member movable about a transverse axis thereon and wholly supportvertically adj ustaxis, said mining machine being ed thereby, a pivoted frame supportin said member and movable about a vertica axis on saidtruck, said pivoted frame supporting the transverse pivot for said guide menr her, and a kerf cutting mining machine carried on said plane kerf in the working face in a plane parallel with said guide member, said minmg machine being movable bodily longitudinally therealong during cutting.

52. A mining machine comprisin a wheeled truck, vertically adjustable guifiing means supported therebn and en ageable with the face for supporting there y, and kerf cutting mechanism including a cutter bar movable relative to said guidm means and disposable substantially midway tween the same or adapted to be fed for substantially its full length into a face while disposed at an angle to the path of movement.

53. A mining machine comprising a wheeled truck, a vertically adjustable uide supported thereon and engageable with the face for sup ort thereby, kerf cutting mechanism inclu in" a cutter bar movable relative to said gui e, and power operated means for elevating said guide mounted on said truck and relative to which said guide is vertically adjustable.

54. A mining machine comprising a wheeled truck, a vertically adjustable guide supported thereon and engageable wit the face for sup rt thereby, kerf cuttin anism inclu 'n a cutter bar movab tive to said on said trudk for selectively driving said truck or elevating said guide.

55. A mining machine comprising a wheel mounted truck, a guide tiltable about a horizontal axis thereon and supportable on the face, and kerf cutting mechanism movable longitudinally of :said guide and disposable at will in a verticalor a horizontal plane.

56. A mining machine mechanism comprising a wheeled truck, guiding means thereon disposable at right angles to a face to be cut, kerfcuttin mechanism movable under its own wer ongitudinally of said means and inc uding and a pivotally mounted cutter chain carrying cutter for adjusting said bar into vertical and horizontal planes including a horizontal lane in which the bar rests upon the mine ttom.

57. A mining machine mechanism comprising a wheeled truck, guiding means thereon di osable at right angles to a face to be cut, erf cutting mechanism movable under its own ower ongitudinally of said means and inc uding a pivotally mounted cutter chain carrying cutter bar movable in a plane and a motor actuating said bar and constituting the source of power for effectinglongitudinal movement of the kerf cute relamechuide, and motor driven means a reciprocable motor' member and adapted to cut a vllf) bar movable in a plane, and means tin mechanism, and means for adjusting said bar into vertical and horizontal planes including a horizontal plane in which the bar rests upon the mine bottom and a higher parallel plane.

58. A mining machine comprising a wheel mounted truck, a guide tiltab e about a horizontal axis thereon and supportable on the face, and kerf cutting mechanism including a pivoted cutter bar movable longitudinal of said guide and disposable at will In d1 ferent vertical or different horizontal planes.

59. A mining machine comprising a wheel mounted truck, a guide swiveled on a vertical axis on said truck and tiltable about a horizontal axis thereon and supportable on the truck for face, and kerf cutting mechanism movable longitudinally of said guide and disposable at will in vertical or horizontal planes. 60. A mining machine comprising a wheel inounted truck, a guide tiltab e about a horizontal axis thereon and supportable on the face, motor driven kerf cuttin mechanism movable longitudinally of sai guide and disposable at will in vertical or orizontal planes, and motor driven mechanism on said truck propelling the latter.

mining machine comprising a wheel mounted truck, a guide tiltable about a horizontal axis thereon and supportable on the face, motor driven kerf cuttin mechanism movable longitudinally of sai ide and disposable at will in vertical or orizontal planes, motor driven mechanism on said propelling the latter, and means operatively connectible to said last mentioned mechanism for varying the elevation of said guide.

62. In a mining machine reciprocable toward and from a face in which a kerf is to be cut, a motor having an armature shaft, cuttin mechanism including a swinging cutterdiar actuated by one end of said armature shaft, a turret by which said cutter bar is carried, said turret being rotatable ugon a horizontal axis to permit said cutter ar to o erate in difl'erent planes and being rotata le by the other end of the armature shaft, and rack and pinion mechanism for moving said motor and cutting mechanism bodily longitudinally toward and from the face actuated by the last mentioned and of said armature shaft.

In a mining machine reciprocable toward and from a face in which a kerf is to be cut, a motor having an armature shaft, cutting mechanism including a swinging eutter bar actuated by one end of said armature shaft, a turret by which said cutter bar is carried, said turret being rotatable upon a horizontal axis parallel to the path of re ciprocation of said machine to permit said cutter bar to operate in different Planes and being rotatable by the other end 0 the armature shaft, and rack and pinion mechanism for moving said motor and cutting mechanlsm bodily longitudinally toward and from,

the face actuated by the st mentioned end of said armature shaft.

11 a mining machine, a motor having a rotating element rotating on a horizontal axis, a plurality of ears coaxial with said axis spaced longitiu mally thereof and rotated at equal an ular rates by said motor, a turret arrange at one end of said motor and rotatable on a horizontal axis, a cutting mechanism supported on said turret and including a cutter bar pivotable on an axis perpendicular to the axis of rotation of said turret, an arcuate rack concentric with the axis about which the bar ivots and fixed relative to said bar, a shaf t on said turret rotating on an axis parallel to said last mentioned axis and carrying a pinion meshing with said rack, and means for actuating said shaft to cause the same to swingsaid cutter bar including a plurality of parallel shafts rotatable by one of said gears at different angular rates, and means driven b the other of said gears for effecting bodily rectilinear feeding of said mining machine. 65. In a mining machine, a motor havin a rotating element rotating on a horizonta axis, a plurality of ears coaxial with said axis spaced longitudinally thereof, and r0- and rotatable on a horizontal axis, a cuttmgmechanism supported on said turret.

relative to said bar, a shaft on. said turret rotating on an axis parallel to said last mentioned axis and carrying a. pinion meshing with said rack, and means for actuating said shaft to cause the same to swin said cutter bar including parallel shafts rotatable gears at different angular posedat opposite sides of said second mentioned axis, and means driven by the other of said gears for effecting bodily rectilinear feedin of said mining machine and rotation of said turret.

66. In a minin with a guide, 0

by one of said machine, the combination kerf cuttin mechanism a plurality o rates and dismovable on said guide longitudinally thereof and including a swinging cutter chain carrying cutter bar and means for varying the plane of said bar relative to the plane of said guide, and means for su portin the forward end of said guide in t e face ing cut.

67. In a mining machine, the combination with a guide, of kerf cuttin mechanism movable on said guide longitudinally thereof including a swinging cutter chain carrying cutter bar located beneath the same and means for varying the plane of said bar relative to the plane of said guide, and means for supporting the forward end of said guide in the face being cut.

68. In a mining machine, the combination with a guide, of kerf cutting mechanism movable on said guide longitudinally thereof and including a swinging cutter chain carrying cutter bar and means for varying the plane of said bar relative to the plane of said guide, and means for supportin the forward end of said guide in the face eing cut including a projecting portion on said guide adapted to engage a mine face.

-69. In a mining apparatus, a truck, a guideway, self-contained power operated cutting mechanism movable longitudinally along and upon said guideway, propulsion mechanism for said truck, hydraulic elevating mechanism for said guideway, and a common motor on said truck actuating said propulsion and elevating mechanisms.

70. In a mining apparatus, a truck, a guideway, self-contained power operated cutting mechanism moi'alle longitudinally along and upon said guideway, propulsion mechanism for said truck, hydraulic elevating mechanism for said guidcway providing a ivot therefor, and a'common motor on said truck actuating said propulsion and elevating mechanisms.

71. In a mining apparatus, a truck, self contained power operated cutting mechanism supported thereon including rectilinear feeding means, propulsion mechanism for said truck, hydraulic elevating mechanism for said cutting mechanism, and a common motor on said truck selectively operative to actuate said elevating mechanism and said propulsion mechanism.

72. In a mining apparatus, a truck,'self contained power operated cutting mechanism pivotally supported thereon includin rectilinear fcedin means, propulsion mec ianism for said trudli, hydraulic elevating mechanism for said cuttin mechanism, and a common motor on sai truck selectively operative to actuate said elevating mechanism and said propulsion mechanism.

73. In a mining apparatus, a truck, selfcontained power operated cutting mechanism pivotally supported thereon for ad justment about horizontal and vertical axes includingrectilincar feeding means, propulsion mechanism for said truck, hydraulic elevating mechanism for said cutting mechanism, and a common motor on said true selectively operative to actuate said elevating mechanism and said propulsion mechanism.

7 4. In a mining apparatus, a truck, selfcontained power operated cutting mechanism adjustably supported thereon including a circulating cutter chain and rectilinear feeding means hydraulic means on said truck r adjusting said cutting mechanism,

k body,

and a separate motor for actuating said. hydraulic means.

75. In a mining machine, the combination of a wheeled truck frame, a guiding frame swiveled thereon and having l n i tudinally extendina guideways, said guiding frame being at justable vertically relative to said truck frame, a machine body slidably mounted in said guidcways, cutting mechanism carried by said body including a swingable cutter bar, and motor actuated devices for driving the wheels of said truck, for elevatinq said guiding frame relative to said truck rame, for swinging said cutter bar, and for moving said machine body in said guideways.

76. In a mining machine, the combination of a wheeled truck frame, a guiding frame swiveled thereon and adjustable vertically relative thereto, said guiding frame having longitudinall extending guideways, a. machine body s idably mounted in said guideways, a motor carried within said bod cuttin mechanism carried by said b0 including a swingable cutter bar, mechanism driven by said motor for actuating said cutting mechanism and for swinging said bar and for moving the machine body in said guideways, and inde endent motor actuated mechanism for driving the wheels of said truck and for elevating said guiding frame relative to said truck frame.

77. In a mining machine, the combination of a wheeled support, a body pivotally mounted thereon, means for tilting said body relative to said support, cutting mechanism carried by said body and including a rotatable cutter carrying head, motor driven mechanism for elevating said body relative to the supporting wheels, and motor driven mechanism for actuating said cutting mechanism.

78. In a mining machine, the combination of a wheeled support, a body pivotally mounted thereon, means for tilting said body relative to said support, cutting mechanism carried by said body and including a rotatable cutter carrying head, motor driven mechanism for elevating saidbody relative to the supporting wheels, and motor driven mechanism for actuating said cutting mechanism and for rotating said head.

79. In a mining machine, the combination of a wheeled support, a body pivotally mounted thereon, means for tilting said body relative to said support, a motor within said cutting mechanism carried by the forward end of said body and including a rotatable cutter carrying head, mechanism driven by said motor foractuating said cuttin mechanism, and motor driven mechanism or elevating said body relative to the supporting wheels.

80. In a mining machine, of a wheeled support, a

the combination body pivotally int cutting mechanism carried by said mounted thereon, means for tilting said body relative to said support, a motor within said body, cutting mechanism carried by the forward end of said body and including a rotatable cutter carrying head, mechanism eels.

81. In a mining machine, the combination of a wheeled truck frame, a guiding frame swiveled' thereon for movement in a horizontal plane, said guiding frame also eing tiltable about a horizontal axis and having longitudinall extending guideways, a machine body slid ably mounted in said guideways, mechanism for elevating said guiding frame relative to said truck frame,

body including a cutter bar swingable in vertical and horizontal planes, and motor driven mechanisms for actuating the cutting mechanism and winging said cutter bar, for driving the wheels of-said truck, and for moving said body in said guideways.

n a mining machine, the combination with a wheeled support, a body pivotally mounted thereon, means for tilting said body relative to said support, a motor within said body, cutting mechanism caried by the forward end of said body and including a rotatable cutter carrying head, said head having a cutter bar pivotally mounted thereon, mechanism driven by said motor for rotating said head and for swinging said cutter bar, and motor driven mechanism for elevating said body relative to said supporting wheels.

83. In a mining machine, the combination with a wheeled support, a bod pivotally mounted thereon, means for tiltingsa d body relative to said support, a motor within said body, cutting'mechanism carried by the forward end of said body and including a rotatable cutter carrying head, said head having a cutter bar pivotally mounted thereon, mechanism driven by said motor for rotating said head and for swinging said cutter bar, and amotor driyen mechanism for elevating said body relative to said supporting wheels and for driving the supporting wheels.

84. In a mining apparatus, a truck, substantially horizontal supporting means thereon adapted to engage and be supported by the working face of the material to be mined and to transmit to the latter a portion of the weight of the mechanism said means, a kerf cutting mining machine on said means adapted to cut a plane kerf in the working face in a plane parallel w th said supporting means, and means for vertically adjusting one of said last two ele-- ments.

supported by a 85. In a mining apparatus, a truck, substantially horizontal supporting means thereof the mechanism supported by sai means, a kerf cutting mining machine on said means adapted to cut a plane kerf in the working face in a plane parallel with said supporting means, and means for rotating one of said last two elements about a vertical axis.

86. In a mining apparatus, a truck, substantially horizontal supporting means thereon adapted to engage and be supported by the working face of an entry and to transmit to the latter a portion of the weight of the mechanism supported by said means, a kerf cutting mining machine on said means adapted to cut a plane kerf in the working face, and means for tilting and swinging the same about axes in intersecting planes.

In a mining machine, a wheeled support, a tiltable body mounted thereon. means for tilting said body relative to the supporting wheels and for bodily elevating said body, av motor carried by said body. cutting mechanism including a cutter carrying head rotatably mounted on said body on a longitudinal axis, said head carrying kerf cutting means, and mechanism driven by said motor for actuating said kerf cutting means and for rotating said head about its axis.

In a mining machine, a wheeled support, a tiltable bod mounted thereon, means for tilting said bod y relative to the supporting wheels and for bodily elevating said body, a motor carried by said body, cutting mechanism including a cutter carrying head rotatably mounted on said body on a. lon tudinal axis. said head carrying kerf cutting means, mechanism driven by said motor for actuating said kerf cutting means and for rotating said head about its axis, and motor driven means for propelling said wheeled support.

89.'In a mining machine, a wheeled support, a tiltable bod mounted thereon, means or tilting said bo y relative to the supporting wheels and for bodily elevating said ody, a motor carried by said body, cuttin mechanism including a cutter carrying head 'rotatably mounted on said body on a longitudinal axis, said head carrying pivoted kerf cutting means, and mechanism driven by said motor for actuatin said kerf cutting means, for swingin sai kerf cutting means about its pivot, an for rotating said head about its axis.

90. In a minin ort, a tiltable bo or tilting said wheels and for a motor carried mec anism including machine, a wheeled supmounted thereon, means y relative to the supportbodily elevating said by said body, cuttin a cutter carrying hea 

